public void GetTokens_DynamicExample_ReturnsDynamicObject()
{
dynamic input = new DynamicExample();
input.foo = "hello world";
input.number = 42;
input.boolean = false;
input.@null = null;
var expected = new[]
{
ModelGrammar.TokenObjectBegin("DynamicExample"),
ModelGrammar.TokenProperty("foo"),
ModelGrammar.TokenPrimitive("hello world"),
ModelGrammar.TokenProperty("number"),
ModelGrammar.TokenPrimitive(42),
ModelGrammar.TokenProperty("boolean"),
ModelGrammar.TokenPrimitive(false),
ModelGrammar.TokenProperty("null"),
ModelGrammar.TokenPrimitive(null),
ModelGrammar.TokenObjectEnd
};
var walker = new ModelWalker(new DataWriterSettings());
var actual = walker.GetTokens(input).ToArray();
Assert.Equal(expected, actual, false);
}
public void Analyze_DynamicExample_ReturnsDynamicObject()
{
var input = new[]
{
ModelGrammar.TokenObjectBeginUnnamed,
ModelGrammar.TokenProperty("foo"),
ModelGrammar.TokenPrimitive("hello world"),
ModelGrammar.TokenProperty("number"),
ModelGrammar.TokenPrimitive(42),
ModelGrammar.TokenProperty("boolean"),
ModelGrammar.TokenPrimitive(false),
ModelGrammar.TokenProperty("null"),
ModelGrammar.TokenPrimitive(null),
ModelGrammar.TokenObjectEnd
};
dynamic expected = new DynamicExample();
expected.foo = "hello world";
expected.number = 42;
expected.boolean = false;
expected.@null = null;
var analyzer = new ModelAnalyzer(new DataReaderSettings());
var actual = analyzer.Analyze <DynamicExample>(input).Single();
Assert.Equal(expected.Values, actual.Values, false);
}
public void GetTokens_DynamicExample_ReturnsDynamicObject()
{
dynamic input = new DynamicExample();
input.foo = "hello world";
input.number = 42;
input.boolean = false;
input.@null = null;
var expected = new[]
{
ModelGrammar.TokenObjectBegin("DynamicExample"),
ModelGrammar.TokenProperty("foo"),
ModelGrammar.TokenPrimitive("hello world"),
ModelGrammar.TokenProperty("number"),
ModelGrammar.TokenPrimitive(42),
ModelGrammar.TokenProperty("boolean"),
ModelGrammar.TokenPrimitive(false),
ModelGrammar.TokenProperty("null"),
ModelGrammar.TokenPrimitive(null),
ModelGrammar.TokenObjectEnd
};
var walker = new ModelWalker(new DataWriterSettings());
var actual = walker.GetTokens(input).ToArray();
Assert.Equal(expected, actual, false);
}
public void Analyze_DynamicExample_ReturnsDynamicObject()
{
var input = new[]
{
ModelGrammar.TokenObjectBeginUnnamed,
ModelGrammar.TokenProperty("foo"),
ModelGrammar.TokenPrimitive("hello world"),
ModelGrammar.TokenProperty("number"),
ModelGrammar.TokenPrimitive(42),
ModelGrammar.TokenProperty("boolean"),
ModelGrammar.TokenPrimitive(false),
ModelGrammar.TokenProperty("null"),
ModelGrammar.TokenPrimitive(null),
ModelGrammar.TokenObjectEnd
};
dynamic expected = new DynamicExample();
expected.foo = "hello world";
expected.number = 42;
expected.boolean = false;
expected.@null = null;
var analyzer = new ModelAnalyzer(new DataReaderSettings());
var actual = analyzer.Analyze<DynamicExample>(input).Single();
Assert.Equal(expected.Values, actual.Values, false);
}
public void RunDynamicExamples()
{
// --------------------------------------------------------------------------------------------
// - The dynamic keyword https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/types/using-type-dynamic
//
// --------------------------------------------------------------------------------------------
// Using for different types
Console.Write("[dynamic] Dynamic variable = ");
dynamic value = null;
Console.Write("{0}, ", value != null ? value.ToString() : "(null)");
value = "I can be everything";
Console.Write("{0}, ", value != null ? value.ToString() : "(null)");
value = 123;
Console.Write("{0}, ", value != null ? value.ToString() : "(null)");
value = DateTime.Today;
Console.Write("{0} ", value != null ? value.ToString() : "(null)");
Console.WriteLine();
// --------------------------------------------------------------------------------------------
// Using for complex types and calls to their methods
dynamic temp = new DynamicExample();
// -----------------------------------------
// No IntelliSense for Add() though
Console.WriteLine("[dynamic.MethodCall] Int = {0}, string = {1}, DateTime = {2}",
temp.Add(3, 7), temp.Add("Foo", "Bar"), temp.Add(new DateTime(2010, 1, 1), TimeSpan.FromDays(30)));
// -----------------------------------------
// Lexical checks happen at runtime
try
{
temp.Sub(5, 3);
}
catch (RuntimeBinderException ex)
{
Console.WriteLine("[dynamic.MissingMethodCall] Exception = {0}", ex.Message);
}
// -----------------------------------------
// Some extensive dynamic example
Console.WriteLine("[dynamic.MultiMethod] Int = {0}, string = {1}, DateTime = {2}",
temp.Conversion(123), temp.Conversion("FooBar"), temp.Conversion(new DateTime(2010, 1, 1)));
// --------------------------------------------------------------------------------------------
// Performance
// Testing the performance of normal, boxed and dynamic assignment and operations.
// Another downside of dynamic is the complied result when viewing for example in ILSpy.
// Just try.
// -----------------------------------------
// Normal add and assignment
int intValue = 123;
int intValue2 = 345;
int intTimes = 100000000;
DateTime intCurrent = DateTime.UtcNow;
for (int i = 0; i < intTimes; ++i)
{
intValue = intValue2 + intValue;
}
TimeSpan intResult = DateTime.UtcNow - intCurrent;
// -----------------------------------------
// Boxed add and assignment
object boxValue = 123;
object boxValue2 = boxValue;
int boxTimes = 100000000;
DateTime boxCurrent = DateTime.UtcNow;
for (int i = 0; i < boxTimes; ++i)
{
boxValue2 = (int)boxValue2 + (int)boxValue;
}
TimeSpan boxResult = DateTime.UtcNow - boxCurrent;
// -----------------------------------------
// Dynamic add and assignment
dynamic dynamicValue = 123;
dynamic dynamicValue2 = boxValue;
int dynamicTimes = 100000000;
DateTime dynamicCurrent = DateTime.UtcNow;
for (int i = 0; i < dynamicTimes; ++i)
{
dynamicValue2 = dynamicValue2 + dynamicValue;
}
TimeSpan dynamicResult = DateTime.UtcNow - dynamicCurrent;
// -----------------------------------------
// Display results
Console.WriteLine("[dynamic.Performance] Normal = {0:0.000}, Boxing = {1:0.000}, Dynamic = {2:0.000}",
intResult.TotalSeconds, boxResult.TotalSeconds, dynamicResult.TotalSeconds);
}
